公开(公告)号：US20170016298A1

公开(公告)日：2017-01-19

申请号：US15123857

申请日：2015-03-04

申请人： Kureha Corporation

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA ,  TAKUMA KOBAYASHI

IPC分类号： E21B29/02 ,  C08K5/00 ,  C09K8/42 ,  E21B33/12

CPC分类号： E21B29/02 ,  C08K3/012 ,  C08K5/0016 ,  C08K5/0033 ,  C08K5/092 ,  C08K5/1575 ,  C08K5/42 ,  C08L75/04 ,  C09K8/426 ,  E21B33/1208 ,  E21B33/134 ,  E21B43/26 ,  C08L21/00

摘要： A degradable rubber member for a downhole tool formed from a rubber material containing from 0.1 to 20 parts by mass of a degradation accelerator relative to 100 parts by mass of a degradable rubber (optionally containing other rubber materials and/or reinforcing materials), of which, preferably, the decrease rate of the mass or the 50% strain compressive stress after immersion for 24 hours in 150° C. water is not less than 5%, and/or the mass loss rate after immersion for 72 hours in 150° C. water is from 5 to 100%, and further, as desired, the tensile fracture strain at 66° C. is not less than 50%, the 70% strain compressive stress is not less than 10 MPa, and the compressive fracture strain is not less than 50%; a degradable seal member or a protecting member for downhole tools comprising such a rubber member; and a downhole tool such as a plug for well drilling, and a method for well drilling.

摘要翻译： 一种用于井下工具的可降解橡胶构件，其由相对于100质量份的可降解橡胶（任选地包含其它橡胶材料和/或增强材料）的0.1质量份到20质量份的降解促进剂的橡胶材料形成，其中， 优选在150℃水中浸渍24小时后的质量或50％应变压缩应力的降低率为5％以上，和/或150℃下浸渍72小时后的质量损失率 水为5〜100％，进一步根据需要，66℃下的拉伸断裂应变为50％以上，70％应变压缩应力为10MPa以上，压缩断裂应变为 不低于50％; 用于井下工具的可降解密封构件或保护构件，包括这种橡胶构件; 以及诸如用于钻井的塞子的井下工具和用于钻井的方法。

公开(公告)号：US20150361326A1

公开(公告)日：2015-12-17

申请号：US14761483

申请日：2014-01-14

申请人： KUREHA CORPORATION

发明人： TAKASHI MASAKI ,  TAKUMA KOBAYASHI ,  MASAHIRO YAMAZAKI ,  HIROYUKI SATO

IPC分类号： C09K8/588

CPC分类号： C09K8/588 ,  C08G67/04 ,  C08K5/0033 ,  C08K5/09 ,  C08K5/49 ,  C08L101/16 ,  C09K8/02 ,  C09K8/03 ,  C09K8/035 ,  E21B43/16 ,  C08L67/04

摘要： A well treatment fluid material comprising 100 parts by mass of polyester resin containing 50% by mass or more of a lactic acid resin and at least one of the degradation accelerators of 0.01 to 10 parts by mass of an organophosphorus compound and 10 to 50 parts by mass of a carboxylic acid anhydride.

摘要翻译： 一种处理流体良好的材料，其包含100质量份含有50质量％以上的乳酸树脂的聚酯树脂和至少一种劣化促进剂，0.01〜10质量份的有机磷化合物和10〜50重量份的 质量的羧酸酐。

公开(公告)号：US20170306144A1

公开(公告)日：2017-10-26

申请号：US15520492

申请日：2015-11-12

申请人： Kureha Corporation

发明人： TAKUMA KOBAYASHI ,  HIKARU SAIJO ,  KATSUMI YOSHIDA

IPC分类号： C08L67/04 ,  C08G63/06 ,  C08L33/10 ,  B22C1/22 ,  E21B4/16

CPC分类号： C08L67/04 ,  B22C1/2266 ,  C08G63/06 ,  C08L23/08 ,  C08L33/10 ,  C08L51/04 ,  E21B4/16 ,  C08L33/068

摘要： In light of increasingly severe and diverse excavation conditions for hydrocarbon resource recovery, such as the drilling of very deep wells, provided is a highly impact-resistant polyglycolic acid resin composition that is resistant to damage even from contact or collision with various members during molding, transport, and well drilling; has excellent mechanical properties and heat resistance; can easily be removed as necessary after the completion of well treatment; and contributes to reducing the cost and shortening the process of well drilling. Also, provided is a molded product for well drilling, such as a downhole tool member.

公开(公告)号：US20170015900A1

公开(公告)日：2017-01-19

申请号：US15123823

申请日：2015-03-04

申请人： KUREHA CORPORATION

发明人： MASAYUKI OKURA ,  TAKEO TAKAHASHI ,  TAKUMA KOBAYASHI

IPC分类号： C09K8/72 ,  C09K8/62 ,  E21B33/12 ,  C09K8/78

CPC分类号： E21B33/12 ,  C09K8/72 ,  F16J15/102

摘要： A well treatment method characterized by disintegrating an elastic material by contacting a seal member for downhole tools comprising the elastic material with a well treatment fluid (acids such as hydrochloric acid, formic acid, acetic acid, and hydrofluoric acid, alkalis, hot water, steam, organic solvents, and the like).

摘要翻译： 一种井下处理方法，其特征在于，通过使包括弹性材料的井下工具的密封构件与井处理流体（酸如盐酸，甲酸，乙酸和氢氟酸，碱，热水，蒸汽 ，有机溶剂等）。

公开(公告)号：US20160298017A1

公开(公告)日：2016-10-13

申请号：US15036149

申请日：2014-10-27

申请人： KUREHA CORPORATION

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA ,  SHINYA TAKAHASHI ,  TAKUMA KOBAYASHI ,  FUMINORI KOBAYASHI ,  HIROYUKI SATO

IPC分类号： C09K8/508 ,  E21B33/138 ,  E21B21/00

CPC分类号： C09K8/5086 ,  C04B40/0092 ,  C09K8/035 ,  C09K8/426 ,  C09K8/44 ,  C09K8/504 ,  C09K8/508 ,  C09K8/62 ,  E21B21/003 ,  E21B33/138 ,  E21B33/14 ,  E21B43/11 ,  E21B43/26 ,  C04B26/10

摘要： A temporary plugging agent for well drilling having a plugging function for a period of not greater than 40 days in a high-temperature environment having a temperature range between 93 and 204° C., and preferably, the above temporary plugging agent for well drilling (optionally formed from two or more types of plugging agents for well drilling) wherein a contained synthetic resin has a ratio of mass loss rate in 80° C. deionized water relative to the mass loss rate of polyglycolic acid of not less than 0.001 and less than 1, and/or has a compressive strength after a period of not greater than 40 days has elapsed at a temperature range between 93° C. and 204° C. of not less than 20% lower than the compressive strength before the period began; a well-treatment fluid comprising the temporary plugging agent for well drilling; and a method for well drilling in which a temporary plugging treatment is performed using the temporary plugging agent for well drilling.

摘要翻译： 一种在温度范围为93〜204℃的高温环境下具有堵塞功能不超过40天的钻井用临时堵漏剂，优选为上述用于钻井的临时堵塞剂（ 任选地由用于钻井的两种或更多种类型的堵塞剂形成），其中所含的合成树脂具有相对于聚乙醇酸的质量损失速率在80℃的去离子水中的质量损失率的比率不小于0.001且小于 1和/或在93℃至204℃之间的温度范围内经过不超过40天的时间后的抗压强度不低于该时段开始之前的抗压强度的20％以上; 包括用于钻井的临时堵塞剂的良好处理流体; 以及用于钻井的方法，其中使用用于钻井的临时堵漏剂进行临时堵塞处理。

公开(公告)号：US20160290091A1

公开(公告)日：2016-10-06

申请号：US15037352

申请日：2014-12-25

申请人： KUREHA CORPORATION

发明人： TAKEO TAKAHASHI ,  MASAYUKI OKURA ,  TAKUMA KOBAYASHI

IPC分类号： E21B33/12 ,  C08L67/04

CPC分类号： E21B33/12 ,  C08L67/04 ,  C08L101/00 ,  E21B43/26 ,  E21C37/06 ,  F16J15/102

摘要： Provided is a degradable seal member for downhole tools, the member being formed from a degradable polymer material that is preferred to be a thermoplastic polymer material or a polymer material including an ester bond, an amide bond, or a urethane bond, and that is further preferred to be a polymer material that contains an aliphatic polyester. It is preferred that the degradable seal member exhibits a bending elastic modulus of 0.01 to 8 GPa at 23° C., further preferred that a stable state is maintained in a dry environment and that degradation in a fluid of a temperature not less than 66° C. is possible, and also preferred that a molded article has an annular shape. Also provided are a downhole tool such as a plug for well drilling and completion, and a method of well drilling and completion.

摘要翻译： 提供一种用于井下工具的可降解密封构件，该构件由优选为热塑性聚合物材料的可降解聚合物材料或包含酯键，酰胺键或氨基甲酸酯键的聚合物材料形成，并且其进一步 优选为含有脂肪族聚酯的聚合物材料。 优选的是，可降解密封构件在23℃下的弯曲弹性模量为0.01〜8GPa，进一步优选在干燥环境下保持稳定状态，并且流体中的温度不低于66° C.是可能的，并且还优选模制品具有环形形状。 还提供了诸如用于钻井和完井的塞子的井下工具以及钻井和完井的方法。